Electric time-switch.



No. 793,060. PATENTED JUNE 27, 1905. M. DANZIGER.

ELECTRIC TIME SWITCH.

APPLIOATIOK FILE MAR. so, 19oa. RENEWED MAY 20.1905.

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No. '793,060. PATENTED JUNE 27,1905.

M. DANZIGER.

ELECTRIC TIME SWITCH.

APPLICATION FILED MAR. 30, 1903. RENEWED MAY 20.1905.

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W1; 216004 a 1- Q [2 zwml 01 UNITED STATES Patented June 27, 1905.

MARTIN DANZIGER, OF GLEIWVITZ, GERMANY.

ELECTRIC TIME-SWITCH.

SPECIFICATION forming part of Letters Patent No. 793,060, dated June 27, 1905.

Application filed March 30, 1903. Renewed May 20, 1905. Serial No. 261,439.

To all whom, it may concern:

Be it known that I, MARTIN DANZIG'ER, a subject of the German Emperor, and a resident of Tarnowitzerstrasse, Gleiwitz, Silesia, Germany, have invented a new and useful Device for Automatically Switching an Electric Ourrent Periodically On and Off, substantially as hereinafter set forth.

' The present invention relates to means for automatically switching an electric current periodically on and off; and it consists of the details of construction hereinafter described, and particularly pointed out in the claims.

In order to render the present specification easily intelligible, reference is had to the accompanying drawings, in which similar characters of reference denote similar parts throughout the several views.

Figure 1 is a plan, and Fig. 2 an. elevation, of the device for making and breaking the main current to be controlled. Fig. 8 is a front elevation, and Fig. 4 a vertical crosssection through the dial, of a clock and the adjoining parts as used to control the making and breaking mechanism. Fig. 5 is a front View, and Fig. 6 a central vertical cross-section, of one of the movable clock contactpieces. Figs. 7 8, and 9 show the movable contact in three different positions when operated by the hand of the clock, and Fig. 10 is a diagram showing the electric connections with the clock and batteries.

Referring first to Figs. 1 and 2, the main circuit to be controlled is provided with the terminals 5 and f, in conductive connection with which are the cups 0 and (Z, containing mercury. A lever I), of conductive material, is pivotally mounted at a; and provided with two arms, one extending into each of the said cups. This arm is insulated and provided with a tailpiece extending beyond its pivot, which lies in the path of movement of an armature a, pivotally supported and adapted to be attracted by an electromagnet m. An adjusting-screw s is provided to limit the play of the armature. The armature a is not of soft iron, but advantageously of steel, so that when it is once attracted it will stick to the magnet by the remanent magnetism and will only be released from the same by sending a current through the said magnet in the opposite direction. Vhen the armature is In the position shown In Fig. 1, the mam cIrcuIt to be controlled is closed by the arms of the lever 7) dipping into the cups 0 and (Z, as will be readily understood; but as soon as the armature a has been attracted it will press on the tail of the arm 5 and break the contact by withdrawing the arms from the cups 0 and (Z and will remain in this position until a current has been passed through the electromagnet in the opposite direction.

The clock for controlling the main circuit is provided with two contacts 0 and 7*, which are adjustable on bows u and t to any hour of the dial. The construction of these contacts will be better seen from Figs. 5 to 9. The contact-piece p is provided with a sleeve /L, by means of which it may be turned on a spindle fast to an arm of the contact 1*. In order to prevent the plate p from lying flat on the dial, and thus being unable to turn on its pivot, the said plate is provided with a slight protrusion 1;, which lies on the dial and on which the said piece may always be tipped, Figs. 7 to 9. The under surface of the piece 19 is provided with a layer of insulating material, so that when the hour-hand of a clock, which makes contact, as hereinafter described, passes under the said piece 1) no contact will be made. When the hour-hand, which is advantageously somewhat thickened at its end, passes over the upper surface of the piece 1), it will make contact, as hereinafter described, and also tip the said piece p around its pivot, so that the next time the hand comes round it will pass under the piece p, Fig. 9, and will tip it back without, however, making contact, so that it will be in position to make contact again the next time it comes round, Fig. 8. The hour-hand is in conductive connection with a contact .2, which may be operated by the minute-hand in any suitable manner to close a contact with g, Fig. 10, every hour or periodically in any desired manner. The construction of the contactpiece In is substantially the same as that of 3). As will be seen from Fig. 10, the contact it lies in a circuit 2, having a battery therein and leading to one side of the electromagnet 112, while the contact 19 is in a circuit 1, having a battery therein and leading to the opposite side of the magnet 712. As this latter circuitiis forre leasing the armature a, it is advantageously provided with a resistance w.

The device operates in the following manner: Assuming the contact It to be adjusted to twelve oclock and the contact 19 to the hour of six and both contact-pieces to be tipped in the position shown in Fig. 7, when the hour-hand reaches six it will make contact with the piece 9 and close the circuit 1, so that a current will flow through the magnet m and release the armature (0, thus allowing the arm 6 to project its arms or fingers into the two cups 0 and f and make the main circuit and, say, turn on the electric-light circuit at six oclock in the evening. The hour-hand passes on and at twelve oclock at night makes contact with the piece 70 and closes the circuit 2. This has the efiect of attracting the armature wand cutting off the main circuit, in that thearm 6 is withdrawn from the cups 6 and f. The next time, however, that the hand passes the contact 10 it will not make contact, but will merely place the said arm in position for its next arrival, and this will also be the case with the contact 70, so that the current will remain cut off during the whole of the night after twelve and for the next day, when thecurrent will be made again at six in the even ing: Thus by means of the present invention a current may be turned on automatically for a certain number of hours during the day and be turned off automatically, for therest of the day independently of the periods.

V I claim as my invention 1. In adevice for switching in an electric current during a certain number of hours out of the twenty-four, and then switching it out again, the combination of a pivoted arm to make and break the circuit to be controlled, an electromagnet havingvca .remanent mag netic armature to control said arm, a clock having an hour-hand and two movable contacts adjustable thereon and mounted in the path of the hour-hand, electric connections from the hour-hand to each side of the electromagnet'forming two circuits each having a source of electricity therein, and means for alternately closing the said circuits as the hour-hand passes over the two movable contacts and means in connection with the said movable contacts for preventing electric connection during the next passage of the hand and enabling it again alternately substantially as described.

2. In a device of the-class specified the combinati'onof means for making and breaking the main current, an electromagnet having a remanent magnetic armature to control said means, a clock havingvmovable contact-pieceson the dial and an hour-hand to contact al-v ternately therewith, two electric circuitsand connections'oneto each :sideof theelectromagnet fromvone of the'said contactsand electric connections to make contact throughthe hour-hand when the latter contacts with either of the said dialicontact-pieces, means for closing the circuit to-one side ofthemagnet when the hour-hand passes'one contact and to the other side when-it :passes the other contact and for allowing the said hour-handto pass the said contacts alternatelywithout making contact and a resistance in that -circu it to the magnet which effects therelease of the armature substantially as described;

In witness whereof I have hereuntoset my,

hand in presence of two witnessesp MARTIN DANZIGER;

Witnesses:

ERNST .KA'rz, ALBERT SHENK. 

